Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO_(2)/FePd composite ribbons  

作　　者：郭永斌 王岛 王忠民 马垒 赵振杰 Yong-Bin Guo;Dao Wang;Zhong-Min Wang;Lei Ma;Zhen-Jie Zhao(Key Laboratory of UWB&THz of Shandong Academy of Sciences,Institute of Automation,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;College of Science,Qiongtai Normal University,Haikou 571127,China;School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Engineering Research Center for Nanophotonics and Advanced Instrument,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China)

机构地区：[1]Key Laboratory of UWB&THz of Shandong Academy of Sciences,Institute of Automation,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China [2]College of Science,Qiongtai Normal University,Haikou 571127,China [3]School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China [4]Engineering Research Center for Nanophotonics and Advanced Instrument,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China

出　　处：《Chinese Physics B》2023年第7期347-352,共6页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Shandong Province,China(Grant No.ZR2022MF276);the Major Innovation Fund of Qilu University of Technology(Shandong Academy of Science),China(Grant No.2022JBZ02-02);the Fund from Shanghai Science and Technology Commission,China(Grant No.22142200900);the Natural Science Foundation of Guangxi Zhuang Autonomous Region,China(Grant No.2019GXNSFAA245056).

摘　　要：The dipolar interactions are investigated through the asymmetric magneto-impedance in FINEMET/SiO_(2)/FePd composite ribbons.The interface between the hard(FePd layer)phase and soft(FINEMET ribbon)phase is coherent by SiO_(2)layer in FINEMET/SiO_(2)/FePd composite ribbons,which effectively induces dipolar interactions.The contribution of dipolar interaction to the bias field(Hb)by asymmetrical giant magneto-impedance and magnetic properties is analyzed.The results show that Hb response decreases with the increase of the SiO_(2)layer thickness,indicating that the linear region near-zero field can be tuned by the thickness of SiO_(2)layer.These results allow the GMI ratio(58%)and characteristic frequency(500 kHz)to be optimized.The transverse and longitudinal magnetic domain structures of FINEMET ribbon and FePd film are confirmed,respectively.The composite ribbons with high GMI ratio and low frequency can be applied to linear magnetic sensors.

关 键 词：asymmetric giant magnetoimpedance FePd film composite ribbons 

分 类 号：O469[理学—凝聚态物理]